/**
 * Copyright 2020 Alibaba Group Holding Limited.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.graphscope.groot.wal;

import java.io.IOException;

/**
 * A LogWriter can append data to a queue in the LogService.
 */
public interface LogWriter extends AutoCloseable {

    /**
     * Append {@link LogEntry} to the queue.
     * @param logEntry
     * @return
     */
    long append(LogEntry logEntry) throws IOException;

    void close() throws IOException;
}
